"""Integration test: phase 56 — ``BOR_IMPORT_EXTENSIONS`` is user-extensible.

Proves a NOVEL (non-A9) extension flows through the import machinery
(config → walk → delta → chunk → mock ``SUMMARY_MODE`` digest) against
the story-dedicated fixture directory ``tests/fixtures/extension_kb/``
(the shared ``docs`` / ``summary_kb`` fixtures stay pinned by their own
suites). The LLM is the deterministic mock server (``tests/e2e/mock_llm.py``)
on a scratch port — the integration analogue of the e2e ``mock_llm``
fixture — so the summary is the byte-stable ``SUMMARY_MODE`` digest and
the vectors are genuine token-overlap embeddings. Runs against the local
compose Postgres (the ``db`` fixture from ``tests/conftest.py``); only
the distinctive ``extension_kb`` source rows are created and deleted, so
the rest of the shared KB is untouched.

Runs (DB must be up: ``podman compose up -d db``):

    uv run pytest tests/integration/test_import_extensions_env.py -v
"""
from __future__ import annotations

import asyncio
import os
import socket
import subprocess
import sys
import time
from collections.abc import Iterator
from pathlib import Path
from typing import Any

import httpx
import pytest
from sqlalchemy import select
from sqlalchemy.orm import Session

from app.config import Settings
from app.models import Document
from app.rag.importer import import_sources
from app.rag.llm import LLMClient

REPO = Path(__file__).resolve().parents[2]
FIXTURES = REPO / "tests" / "fixtures" / "extension_kb"
SOURCE = FIXTURES.name  # "extension_kb" — distinctive, never asserted by count
SH_REL = "homelab/scripts/uptime.sh"
MD_REL = "homelab/notes/note.md"
SENTINEL = "UPTIME-PROBE-SENTINEL-9c2f"
#: The mock's SUMMARY_MODE tokenizes the document (``[a-z0-9]+``) — the
#: hyphenated sentinel lands in the digest in its tokenized form.
SENTINEL_TOKENS = "uptime probe sentinel 9c2f"


def _wait_http(url: str, timeout: float = 30.0) -> None:
    deadline = time.monotonic() + timeout
    last_err = "unknown"
    while time.monotonic() < deadline:
        try:
            httpx.get(url, timeout=2.0)
            return
        except Exception as e:  # noqa: BLE001 — retry until deadline
            last_err = str(e)
            time.sleep(0.2)
    raise RuntimeError(f"mock LLM at {url} did not come up: {last_err}")


@pytest.fixture(scope="module")
def mock_llm_port() -> Iterator[int]:
    """The deterministic mock LLM (``tests/e2e/mock_llm.py``) on a free
    scratch port — same server as the e2e ``mock_llm`` fixture, but
    private to this file (integration tests otherwise run network-free)."""
    sock = socket.socket()
    sock.bind(("127.0.0.1", 0))
    port = sock.getsockname()[1]
    sock.close()
    env = dict(os.environ)
    env.pop("DEBUGPY", None)
    proc = subprocess.Popen(
        [sys.executable, "-m", "uvicorn", "tests.e2e.mock_llm:app",
         "--host", "127.0.0.1", "--port", str(port), "--log-level", "warning"],
        cwd=REPO,
        env=env,
    )
    try:
        _wait_http(f"http://127.0.0.1:{port}/v1/models")
        yield port
    finally:
        proc.terminate()
        try:
            proc.wait(timeout=10)
        except subprocess.TimeoutExpired:
            proc.kill()


def _settings(mock_port: int, extensions: str) -> Settings:
    kwargs: dict[str, Any] = {
        "_env_file": None,
        "llm_base_url": f"http://127.0.0.1:{mock_port}/v1",
        "import_extensions": extensions,
    }
    return Settings(**kwargs)  # pyright: ignore[reportCallIssue]


def _cleanup_source(db: Session, source: str) -> None:
    for doc in db.scalars(select(Document).where(Document.source == source)).all():
        db.delete(doc)
    db.commit()


def test_novel_extension_imports_end_to_end(mock_llm_port: int, db: Session) -> None:
    """``md,sh`` (a novel extension) imports the ``.sh`` file end to
    end: row + plain-text chunks + the mock ``SUMMARY_MODE`` digest,
    with the markdown control doc imported as well."""
    settings = _settings(mock_llm_port, "md,sh")
    assert settings.import_extension_set == {".md", ".sh"}
    summary = asyncio.run(import_sources([FIXTURES], LLMClient(settings), session=db))
    try:
        assert (
            summary.files, summary.added, summary.unchanged, summary.updated, summary.errors
        ) == (2, 2, 0, 0, 0)
        assert summary.formats == {"sh": 1, "md": 1}
        # Phase 118 (A2): EVERY doc gets a lite summary — the novel
        # ``.sh`` file AND the markdown control.
        assert (summary.summaries, summary.summary_errors) == (2, 0)

        sh = db.scalar(
            select(Document).where(
                Document.source == SOURCE, Document.path == SH_REL
            )
        )
        assert sh is not None, "the novel .sh extension was not imported"
        # Non-markdown: the title comes from the file stem (a ``#`` line
        # is a comment, not a heading).
        assert sh.title == "uptime"
        # Plain-text chunking: the content (incl. the sentinel) is
        # chunked and every content chunk is embedded at the 768-dim
        # contract.
        content = [c for c in sh.chunks if not c.is_summary]
        assert content, "the .sh file has no content chunks"
        assert all(
            c.embedding is not None and len(c.embedding) == 768 for c in content
        )
        assert any(SENTINEL in c.content for c in content)
        # Mock SUMMARY_MODE digest: byte-stable, the tokenized sentinel
        # inside it, plus the code-appended pointer line.
        assert sh.summary is not None
        assert sh.summary.startswith("This document covers")
        assert SENTINEL_TOKENS in sh.summary
        assert f"Source: {SOURCE}/{SH_REL}" in sh.summary
        schunks = [c for c in sh.chunks if c.is_summary]
        assert len(schunks) == 1 and schunks[0].position == -1
        assert schunks[0].embedding is not None

        # The markdown control doc imported too — AND got the mock
        # ``SUMMARY_MODE`` digest (phase 118, A2: markdown summarized).
        note = db.scalar(
            select(Document).where(
                Document.source == SOURCE, Document.path == MD_REL
            )
        )
        assert note is not None
        assert note.summary is not None
        assert note.summary.startswith("This document covers extension fixture note")
        assert f"Source: {SOURCE}/{MD_REL}" in note.summary
        note_schunks = [c for c in note.chunks if c.is_summary]
        assert len(note_schunks) == 1 and note_schunks[0].position == -1
        assert note_schunks[0].embedding is not None
        assert [c for c in note.chunks if not c.is_summary]
    finally:
        _cleanup_source(db, SOURCE)


def test_narrowing_to_md_still_excludes_the_novel_extension(
    mock_llm_port: int, db: Session
) -> None:
    """``md`` (the A9-era narrowing, preserved as a special case): the
    ``.sh`` file is out of scope, only the control note imports."""
    settings = _settings(mock_llm_port, "md")
    assert settings.import_extension_set == {".md"}
    summary = asyncio.run(import_sources([FIXTURES], LLMClient(settings), session=db))
    try:
        assert (
            summary.files, summary.added, summary.unchanged, summary.updated, summary.errors
        ) == (1, 1, 0, 0, 0)
        assert summary.formats == {"md": 1}
        # Phase 118 (A2): the md-only run still summarizes the note.
        assert summary.summaries == 1
        assert db.scalar(
            select(Document).where(
                Document.source == SOURCE, Document.path == SH_REL
            )
        ) is None
        assert db.scalar(
            select(Document).where(
                Document.source == SOURCE, Document.path == MD_REL
            )
        ) is not None
    finally:
        _cleanup_source(db, SOURCE)